ISSN:
1573-5036
Keywords:
Clusterbean
;
Critical level
;
Soil
;
Zinc
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Bulk samples of 26 soils (India) ranging in DTPA-extractable Zn from 0.24 to 2.00 ppm were subjected to greenhouse study to find critical levels of soil and plant Zn for predicting response of clusterbean (Cyamopsis tetragonoloba) to Zn fertilization. Bray's per cent yields (BPY) at 5 ppm added Zn varied from 37 to 117 and was positively correlated with DTPA extractable Zn (r=0.66**) and plant tissue Zn (r=0.88**). The total Zn in six weeks old plants of no added Zn ranged from 11.44 to 24.79 ppm. The critical Zn concentration in soil and plant below which plant response to Zn application may be expected was found to be 0.54 and 15.4 ppm respectively. In all the 17 Zn-deficient soils plants responded markedly to Zn application and per cent mean response at 5 ppm added Zn level was 21 to 168 with a mean value of 70 per cent. The critical soil Zn level as calculated by statistical method was similar to the value found by graphical method.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02374352
