海量图书期刊资源,随时随地畅享阅读乐趣
Soil Structure AssessmentECK, HAROLD V. · Soil Science · 1988
Farm Land ErosionWicherek, S.; ECK, HAROLD V. · Soil Science · 1994
Winter Wheat Response to Nitrogen and IrrigationEck, Harold V. · Agronomy Journal · 1988
Irrigated Corn Yield Response to Nitrogen and Water1Eck, Harold V. · Agronomy Journal · 1984
Characteristics of Exposed Subsoil—At Exposure and 23 Years Later1Eck, Harold V. · Agronomy Journal · 1987
Response of Shortgrass Plains Vegetation to Clipping, Precipitation, and Soil WaterHarold V. Eck, Wayne G. McCully and J. Stubbendieck · Journal of Range Management · 1975
Hydrocyanic Acid Potentials in Leaf Blade Tissue of Eleven Grain Sorghum HybridsEck, Harold V. · Agronomy Journal · 1976
Chinese virtual issuePan, B.; Wang, Q.; Zhao, F. · European Journal of Soil Science · 2012
Cation exchange capacity measurementsHorn, D. P.; Alley, M. M.; Bertsch, P. M. · Communications in Soil Science and Plant Analysis · 1982
Lithium toxicity in plantsWallace, A.; Romney, E. M.; Cha, J. W.; Chaudhry, F. M. · Communications in Soil Science and Plant Analysis · 1977
Soil organic matter determinationGallardo, J.F.; Saavedra, J.; Martin‐Patino, T.; Millan, A. · Communications in Soil Science and Plant Analysis · 1987
AbstractsCommunications in Soil Science and Plant Analysis · 1994
Soil zonality of the Chukotka UplandKaravaeva, N. A. · Eurasian Soil Science · 2013
Maximizing calcium uptake by plantsKirkby, E. A. · Communications in Soil Science and Plant Analysis · 1979
SOIL ERODIBILITY, FALL AND SPRINGAnderson, C. H.; Wenhardt, A. · Canadian Journal of Soil Science · 1966