Journal of Kerbala for Agricultural Sciences

An experiment was carried out in one of the farms of Horticulture Department – College of Agriculture – Karbala University during 2014 – 2015 growing seasons aimed to study the effect of Reef Amirich spraying(S1) and without spraying(S2) in growth and yield of two caltivers of cabbage Copenhagen market(V1) and Ruby queen(V2). Randomized Complete Block Design (RCBD) with three replicates were used.
 
The results showed that spraying of Copenhagen market (V1S2) gave a significant increases in plant height(13.42 cm) and total leaf area(105.28 dcm2.plant-1) compared with most other treatments, while highest values in chlorophyll content of leaves recorded in V2S2 treatment(79.13 SPAD), whereas V1S2 treatment gave a significant increases in yield of heads(2.060 kg. plant-1), while  V2S1 treatment gave a lowest value(1.330 kg. plant-1). 

 A field experment was carried out to study effect of organic manure (wheat residues) and the filtrate extracted from it and the interactionbetween them in the growth and the yield plant eggplant in the field experiment of the spring 2014 season in one of the farms Dujailah area in Wasit province. Add compost in the soil four levels) 0، 10، 20 and 30 tons. ha-1(which weredesignate O1, O2, O3 and O4 respectively, also add Abstract Organic spraying method at rates three) 0, 2 and 4 ml. Liter-1(which was designat S1, S2 and S3 respectively. The experiment was adopted as factorial at Randomized  Complete Block Design (R.C.B.D) with three replicates. The differences between means were tested by Duncan's  Multiples Range Test ( D.M.R.T) at  probability of 0.05.
 
     The results showed that the addition of compost and spraying the Organic extract has affected significantly in the parameters  vegetative growth of plant height, number of branches of the main plant, leaf area, content leavesof chlorophyll, yield parameters(fruit weight, number of fruits. Plant -1, one plant yield, and total yield) compared with treatment without added.Increased influence the greater the amount of fertilizer added. The overlapping factors of the study significantly affected, as it gave the treatment of interactionO3S2 (Add compost level of 30 tons.ha-1+extract Organic concentration of 4 ml. Liter -1), the highest values ​​for all parameters  the study has been amounted (94.41 cm plant -1,8.11 branch. plant -1, 447.5 dcm2. plant -1,64.88 SPAD units ,197.3 g. fruit -1,8.63 fruit. plant -1 and 1.703 kg. plant -1 and 36.61 tons. ha-1) respectively, compared to the treatment ofO0 S0 (without fertilization), which gave the lowest rate for those parameters .

Afield experiment was conducted during two season , spring and fall 2013  in the Field of Crop Science Dept. – College of Agriculture – University of Baghdad . The objective of this experiment are to estimate the genetic parameters , broad sense heritability and co-heritability for several traits of maize ( Zea mays L.) for the synthetic cultivar , Ibaa 5012 , under watered and water stress treatments ( 5 and 10 days intervals) by using randomized complete block design with four replications . Genotypic , phenotypic and environmental variation (   , , ) genotypic and phenotypic coefficient of variation ( GCV , PCV) and broad sense heritability were estimated for ten traits : traits : days to anthesis , days to silking , plant height , ear height , number of leaves , leaf area , days to physiological maturity , dry weight , crop growth rate and grains yield . The results showed that genetic variance for most traits more than environment . GCV values for all traits very closed from PCV , that means the traits were under genetic control .All values of broad sense heritability for both seasons and irrigation treatment are high . The highest value was for the dry weight , crop growth  rate, grain yield and number of leaves in two season under irrigated , while in water stress , in addition to these traits the days to physiological maturity . It can conclude that the change in the plant environment due to water stress caused a change in the genetic parameters of the studied traits , especially the change in the amount of genetic variance and the environmental variance , it increased the values of some parameters of the traits and reduced to some others . This led to a change in the values of heritability and co-heritability.