Zobrazeno 1 - 10
of 173
pro vyhledávání: '"J Vlamis"'
Effects of urbanization, alteration of fertilizer practice, and manganese toxicity on mustard plants
Publikováno v:
California Agriculture, Vol 25, Iss 11 (1971)
A yellowing of leaf margins appeared in the summer of 1970 on mustard plants grown commercially on Bay Farm Island in Alameda County. The symptoms had a drastic effect on the saleability of the crop, and the yields were reduced by almost half.
Externí odkaz:
https://doaj.org/article/17d3bc6451e74be080ffe7c6c337b016
Autor:
J Vlamis, D Williams
Publikováno v:
California Agriculture, Vol 25, Iss 7 (1971)
Sewage sludge and garbage compost were found to be good sources of plant nutrients that increased yields of tomato, barley and lettuce crops. Maximum yields were obtained when the materials were used with the proper rates and combinations of chemical
Externí odkaz:
https://doaj.org/article/0c2ac010af86448084ccdd96a27e50e7
Publikováno v:
California Agriculture, Vol 20, Iss 11 (1966)
Following A change in the water supply used for irrigation and misting–from a shallow well (400 ft) to a deeper well (800 ft)–a large California chrysanthemum producer experienced extreme difficulty in rooting the cuttings. Early symptoms appeare
Externí odkaz:
https://doaj.org/article/8477e387732d431782271a2e425019c3
Autor:
J Vlamis, D Williams
Publikováno v:
California Agriculture, Vol 16, Iss 9 (1962)
Studies of the interaction of nutrients and toxic substances in soils of different acidity levels have shown that liming will raise the pH, increase the calcium supply and lower toxic levels of manganese and aluminum to tolerable amounts. When the pH
Externí odkaz:
https://doaj.org/article/1b684a60d21240528ee72064fb9dbd28
Publikováno v:
California Agriculture, Vol 15, Iss 10 (1961)
A program of brushland conversion from chaparral cover to the more useful cover of grass and clover has been in progress in California for several years. In many situations, prescribed burning is used to accelerate brush disposal. Because of the haza
Externí odkaz:
https://doaj.org/article/8c651a20e6574bd88f563203f084fed5
Publikováno v:
California Agriculture, Vol 13, Iss 2 (1959)
Experimental applications of ferric sulfate to nonsaline alkali spots in rice fields have greatly increased yields.
Externí odkaz:
https://doaj.org/article/f538c2cf51464f9c9227f80fbb509da9
Publikováno v:
California Agriculture, Vol 12, Iss 1 (1958)
Recent studies indicate that nodules on the roots of deerbrush—Ceanothus integerrimus—supply this species with a source of nitrogen and might greatly improve growth of the plant, especially in soils where nitrogen is a limiting factor.
Externí odkaz:
https://doaj.org/article/96d5692c58a8489fa32bd7a3b18535aa
Publikováno v:
California Agriculture, Vol 10, Iss 9 (1956)
Ponderosa pine seedlings were used in a study of soil fertility changes induced by prescribed burning to learn whether nutrient responses would be reflected by a crop natural to the soil.
Externí odkaz:
https://doaj.org/article/daefacafbd0f4b4791b8fe48edbc61f2
Publikováno v:
California Agriculture, Vol 9, Iss 3 (1955)
Effects of prescribed burning on soil fertility were studied on two California forest soils—Salminas at Hobergs in Lake County and Holland at the Teaford Forest in Madera County.
Externí odkaz:
https://doaj.org/article/29e21a0b59534e61a16c82147d0d0cdd
Publikováno v:
California Agriculture, Vol 4, Iss 1 (1950)
Between 50% and 70% of the soils in the major farming sections of California—from Siskiyou County in the north to Imperial County in the south—are deficient in available nitrogen.
Externí odkaz:
https://doaj.org/article/d640e9a5012d4ab381f260b5b7e1e629