mainly between the months of March and December with
two peaks in May and October. The temperatures range
between 8.4c and 26.1c. The soils at the site are rhodic
feral soils which are acidic, moderately deep and well
drained (R. Jaetzold and H. Schmidt,
3.0 materials and method
T. diversifolia leaves was obtained from the farm and
prepared according to recommended methods (KATC and
SCC, 2007; Altierri, 2011). Fifteen kilograms (15 kg) of
fresh and tender leaves of T. diversifolia will be pu
production and could contain significant amounts of
nutrients that can be taken up by plants and be utilized.
These sources contain different levels of nutrients and
will release the nutrients at different levels (palm et al,.
1997). The rate of decomposi
weeks before the green manure is degraded to release the
nitrogen, a process that is influenced by temperature, soil
moisture, population of soil microbes and efficiency of
incorporation. Results from this study indicate that during
the first ten days, th
nutrients. Under organic systems, high nutrient levels
have been shown to accumulate. However, the amount
available for crop uptake is less than crop requirement
creating a deficit in the soil. Many small scale farmers
grow the crops on the same piece of
Mugwe J, Mugendi DN, Kungu J and MN Mucheru
Effect of plant biomass, manure and inorganic fertilizers
on maize yields in Central highlands of Kenya. Afr. Crop
Sci. J. 2007; Vol. 15. N0. 3: 111 126.
Rutunga V, Karanja NK, Gachene CKK and C Palm
kind of substrate and soil amended and the crop being
tested (Blunden, 1991).
It have been suggested by Tenney and Warksman (1929)
that the quality of organic matter is affected by the
contents of water soluble compounds, hemicelluloses,
celluloses and ot
materials, large amount of materials are required to
achieve moderate yield increases. Some of the organic
materials have alternative uses which make their
availability even scarcer. (Sanchez et al., 1997). In the
attempt to compare crop yields in convent
that most of the nutrients had dissolved into the water.
Serial dilutions of ratio 2:3 (leaf tea to water) were done
to reduce the tea concentration. Aliquots of 50 ml leaf tea
taken and analyzed for macronutrients N, P, K.The juice is
rich in NPK and tra
harvesting. The number of leaves on the main stem and
leaf size was determined by formula WLK where W is
the width of the leaf, L length of the leaf and K is a
multiplying factor obtaining from the ratio of the leaf area
(J.Repkova, M. Bresic and K.Olsovo
total N of 60kg per hac. fruit yield and other crop
parameters increased with increased level of sole or
combined application of tithonia compost and inorganic N
fertilizer. the combination of 30-30kg N (compostinorganic fertilizer) was found adequate for
difference according to ANOVA , same with number of
leaves and fresh yield biomass.
On the case of leaf area, those treated with Tithonia and
C.A.N deferred significantly with control and by that I
recommend that to improve leaf area of kales, Tithonia
yield and quality and post harvest storability of Cleome
gynandra (L) Brig. M Sc Thesis
Mziray,R.S., (1999) Nutrient and anti-nutrient contents of
raw, cooked, sundried and stored vegetable amaranth
grown in Dar- Es-Salaam Tanzania
on African Indigenous Vegetable. Pp.22-24, 86-95 (R.
Schippers and L.Budd,eds). ODA,UK.
Chweya JA., (1997). Genetic enhancement of indigenous
vegetables in Kenya. p. 95. In: Traditional African
vegetables: Promoting the con- servation and use of
explained by various reasons. In principle, the lower
yields obtained in organic system have been attributed to
the generally content of the major plants essential
elements in most organic materials. This is particularly so
for phosphorus, whose content i
Research on kales has mainly been foccussing on leaf
yieelds while sidelining the nutritional content in general.
Kales nutriient content study has not been fully exploited.
2.6 Way forward
The fast release of nutrients during the preparation of
Gomez,K.A and A.A Gomez. (1984). Statistical
procedures for agriculture research (6 th edition)
John Wisley and sons, New York,P.P 2007.
Gachimbi LN, Maina F, Obanyi SN, Onduru DD,
Gachini, GN, De J and FN Muchena Evaluation of
organic, inorganic fertiliz
Abe L.O., Imbamba S.K., (1997).Levels of vitamins A
and C in some Kenyan vegetable plants. East Afr.
Agric. Forestry J. 42(3): 316-321.
Abukusta-Onyango, M. O.; Agong, S. G.; Mwai, G. N.;
"Exploiting the Ge
International rules for seed testing. Seed Science and
Technology, 13: 356-513
Fritz, D., Habben, J.1973.Influence of fertilization on the
Gaya, A. S.; Masinde, P. W.; Murakami,
harvesting. Each harvest involved removing all but three
apical leaves. Fresh leaf mass measured immediately.
Yield was calculated from the mass of vegetable leaves
per plot and expessed in grammes.
3.5 data analysis
Data analysis was done using an analys
(1983). Farm Management Handbook of Kenya. Natural
conditions and Farm Management Information.
Ministry of Agriculture, Kenya.
Jaetzold R., and Schmidt H.,1982.Farm management
handbook of Kenya
Kokwaro J.O., (1976). Medicinal plants of East Africa.
Coleoptera coccinellidae. Indian J. Entomol. 49: 294-296
Drescher, A. W.,; Pasquini, M. W.; Shackleton, C. M.
(2009). "African Indigenous Vegetables in Urban
Retrieved November 14, 2013.
Gachimbi L.N., F.Maina, S.N Obanyi,D.D Onduru,
A.De Jagar and F.N Muchena.(2004). Evluation of
organic,inorganic fertilizes and tithonian maize
performance nirisols in central kenya.A farmer field
approach. INMSP Report No.Ke-17,ETC East
Africa and KARI(N
Cataldo, D.A., Haroon, M., Schrader L.E. and Youngs,
V.L. 1975. Rapid Calorimetric determination of
nitrates in plant tissues by nitration of salicyclic acid.
Comm. Soil .Sci. Plant Analysis 6: 71-80.
Chweya, J.A., 1984. Yield and quality of kale as affec
leeks at conventional and organic fertilizing Acta
Horticulturae 93: 209-216.
Okalebo J.R., Palm C.A, Gichuru M, Owuor J.O.,
Othieno C.O., Munyambundu A., Muasya R.M,
Woomer PL (1999). Use of wheat straw, soybean
trash and nitrogen fertilizer for maize pr
Onyango, M.A., Obiero, H. and Miruka, M. 2000.
Indigenous green leafy vegetables in Kenya: a case
of a neglected resource. Kenya Agricultural Research
Institute, Soil Management and Legume Research
Network Projects. pp 245-256.
Chweya J, Imungi J